Non-numerical switch.



C. L. GOODRUM.

' NON-NUMERICAL SWITCH.

APPLICATION FILED SEPT. 11. IBIS.

1,254,681. mam 32m. 29, 1221s.

a lnvenfor: Charles L. 6cud/wmw UNITED STATES PATENT orrion CHARLES L. GOODRUM, OF BROOKLYN, NEW YORK, ASSIGNOR 'I'O WESTERN ELECTRIC COMPANY. INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

NON-NUMERICAL SWITCH.

Specification of Letters Patent.

. Patented Jan. 29, 1918'.

To all whom it may concern:

Be it known that 1, CHARLES L. Gooonom,

" a citizen of the United States, residing at vnates in that line.

Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in N oil-Numerical Switches, of which the following is a full, clear, concise, and exact; description.

This invention relates to improvements in non-numerical switches of the type employed in completing connections between calling and trunk lines.

It has formerly been customary in switches of this type to preselect an idle trunk for a calling line before a call origi- The present invention has for its purpose the preselection of a second idle trunk with a view of reducing the time interval in interconnecting-calling and trunk lines.

The drawings represent a perspective view of the improved switch. The frame and other unnecessary parts are omitted for clearness in illustration and description. Certain operating circuits are associated with the mechanical parts to more clearl disclose their method of operation.

Referring to the drawing, 5 designates a shaft mounted in the supporting structure (not shown). This shaft serves to support the contact makers or plungers 6, and their several controlling members. i A U-shaped frame 8 comprising a relatively long vertica] member and horizontally extending arms 9 and 10 is rotatably mounted on the shaft 5; The vertical member 8 of the frame is rovided with a rib 11, which extends at rig it angles to the vertical member 8, and lies in the direction of the shaft. The frame is connected to a locking plate 12 by, a sleeve 13 which also serves as a bearing on which these members rotate on the snaft. The locking plate 12 is sector-shaped, andits wide end is provided. with notches 14. A trip magnet 15 is provided with an armature 16 which is pivoted at 17. This armature is provided with extensions, one of which supports the catch 18, which is mounted to engage in notches 14 in the looking plate, and the other extension 19, which serves to close the contact springs 20 when the trip magnet 15 is energized. This magnet is provided with a locking coil 21, for a purpose herein later described. The shaft is also provided with collars 22 which sup-' port a plurality of contact makers or pluning an'upturned end 23 and an enlarged end which broadens out to form a sector-shaped member 24. The upturned end of the plunger is provided with an insulated knob 25, adapted to enter the contact bank 26 of a gers 6, each of which consists of a bar hav-' structure commonly utilized in switches of this type. The shaft is passed through'elongated apertures 27 in these plungers. The free end of the sector-shaped member 24 is provided with a notch 28, which is engaged bythe rib 11, of the frame 7 when the plungersare drawn into engagement with the frame by the spring 29. An integral lug 30 on the plunger is engagedv by the armature 31 of a magnet, 32 to move the associated plunger into the contact bank when the magnet is energized. This magnet is provided with a pull down winding 33 and a holding coil 34. Sets of circuit-closing springs 35 are also controlled by the actuation of the armature 31. The upper end of the shaft rotatably supports an arm 36 which terminates at one of its ends in an angular extension 37 provided with an insulated knob 38. This knob serves to close the circuit-closing springs 39 which are carried by the U-shaped frame, whenever the arm 36 and the frame move into alinement. The other end of arm 36 is provided with a. brush 40 which engages contacts 41 of a master switch bank. The arm 36 is rigidly connectedjto locking plate .42 ,by a collar 43'which also serves as a. bearing'on whihh these'me bers rotate" on themsil gaft, The locking pl to 42 is sector-shaped andis also provided with notches I se notches are engaged by a catch .44 carried on ,an extension of the armature 45 of a'trip magnet 46. This armature has a second angular extension provided with. an insulated knob 47 adapted to close the circuit-closing springs 48 when the armature is in its retracted' position. The other end of the looking plate 42 is fork-shaped and its members are provided wit insulated projections 49 and 5 Insulate projection 49 in one of its extreme positions serves to close circuitclosing springs 51, while projection 50 serves to release the armaturefiZ of locking magnot 53 from its catch 54. The armature 52 tery,

67, conductor 68 to ground.

ape'rtured vertical lug 57 of the plunger 58 of solenoid Referring now switch, it should be noted SG throughWhicli rod 59 is passed. to the opereti of the that the ltslriped frame normally locked with its idle plungers in operative relation While the arm frame is resiliently l 18' held in operative relation to :1

Whenthe preselected trunk 18 idle trunk.

to an idle trunk, 36 to which the U-shaped connected by the spring second seized, the U-sheped frame is released and under the action of spring 74:, moves into alinement with the arm 86 where it is locked, whereupon operating circuits are closed to move the arm 36 to preselect a second idle trunk. Assuahing that the U-sheped frame is holding its idle plungers in operative relation to the first t case the brush with the first contact of the master runh of the group, in which 72 will be in engagementswitch bank ll and that the arm 36 is in position before the second. trunk oi? V I its brush 4:0 in engagement with the secono contact of the master switch the group with 1 bank 41, when the subscriherlocated at 60 removes his receiver'from the switch hook, lmo'relay 61 is energized over ing springs ee-y 64c, conductor front contact and armature circuit Whieh extends from grounded battery, relay (i1, innernmst cirquit-closing springs 35, conductor 62, substation 60, conductcs 63,

35 to ground. Line relay 61 atcutermost circuit-closa 'circuit 33 of magcircuit-closing springs l8, conductor 65, pull down of relay 61 to ground. The srmeture of magnet 32 is attracted and engages the lugfit) of theplum ger individual moves the insulated linoo of 6 into the selected to the calling line. This the plunger benlrof contacts 261' The holding coil 3c is thereupon energized ever a circuit which extends from grounded batholding coi coil holds the pl l 3i, contact springs 66 and This holding unger firmly in the contact bank until the ground on conductor 68 is removed when one of the parties receiver at the close of the contact springs 69 circuit is completed replaces his the conversation. At

thetrip magnet 15.

This circuit extends from grounded battery,

winding of trip maonet l5, conductor 71,

brush 72 now in 'en a enient With the first :9 E:

V contact of master switch '73, spring 69,

bank 41., conductor spring to ground. The

magnet 15 is energized and attracts its erme tore l6. i'ooves the catch The attraction of armature 16 out of engagement with to move into :retrectile, spring tron, armature '34-. in its attracted posi it also closes the circuit- Winding 33,

and 70, an energizing interrupting the energizing ere notch ltwhich permits the locking plate tb. its essocieted frame first contact or" the locking plate 42 to closing springs 20 and completes a locking circuit for magnet 15 from grounded battery, resist-once T5, s 'irings i conductor 2'9, coil 21., to ground. When t l0 arm 36 moves into alinemeut with il-sl1uped ifrainr ihe in-= striated knob 38 of angular extension 3? closes the springs 39. This serves to complete a circuit through starting relay 76', which circuit extends from grounded battery, wimfling 77 of the starting relay, conductor 78, left and righthand circuit-closing sprin 's 39 to ground. Simultaneously e shunt circult is completed about the locking winding; of the trip magnet 15, which causes this magnet to retract -its armature. This shunt circuit extends from grounded bitter-y re sistance 75, conductor 79, middle and righthand circuit-closing springs of set 39 to ground. Trip relay 15 then retracts its armeturc to lock frame 8 before a preselectwl trunk. The starting relay when it at tracfied its armature, completed an energizing circuit for the trip magnet to. This circuit extends from grounded battery, winding of magnet 45, conductor 83, arniurture and front contact oi stz irting relay Hi to ground. l he trip magnet uettracts its armeture L5 and thereby withdraws the catch i l from notch 48, thus allmwin'g the lociaiu late to move under the tension oi its controlling spring. The armature at its knob l? opens the contact springs 48., thus circuits oiall of the pull down coils. This prevents any plunger from operating until the lockii if plate 462 with its associating member 36 is directly in front of a set of idle trunks. fit the beginning of the cycle of operation oi the switch when the brush 4:0 engages tie master switch bank 41, the insulated knob 29 of the locking plate {l2 brings'the circuit-closing s rings 51 into ongagenient. ii' the some me the Starting r'eley 76 conmletes an energizing circuit for the loci: magnet 53. Th's circuit extends .troi'n grounded battery, magnet 53'; circuit closing springs 51, held in engagement by the knob 4:9 in its remotest position, conductor 80, armature and front contact of starting relay 76, to ground. Lock magnet 53 attracts its armature 52. This urnniture is held in ultreeted position by latch member 54-, Which causes the insulated end of crumture 52 to close the springs 55, con'npleti an energizing circuit for the solenoid 59. This circuit extends from grounded battery. solenoid 5'9, conductor 81., Cll'(3llliCil()Slll;l springs 55 to ground 'Soleuoid 55) remains energized until the close of the cycle of operation of the s itch after the brush to has swept over the master switch. bank ii.

the knob 50 disen a es the armature from latch 54, whereupon the spring 84: moves the bring its knob is into engegementwith the circuihclosing springs 51 and places the brush into engagement with the first contact of master switch bank 41. The solenoid during its energization attracts its plunger 58 and thus serves to move the locking plate 42 Whenever this plate is disengaged from the catch 44:.

It will thus be seen that the U-shapcd' frame 8 preselects' an idle trunk, while the arm 36 serves to preselect a second idle trunk. If the sets of contacts immediately adjacent to the sets before which the frame 8 is in operative relation for engagement is busy, th1s condition will be indicated by ground on the related contact in the master switch bank ll. As soon as brush 40 engages any grounded contact, the winding 82 of relay 76 will be energized over the following circuit: grounded battery, winding 82, brush 40 and grounded contact of the master switch bank. The attraction of the armature of'relay 76 completes an energizin; circuit for magnet 46, which magnet releases the locking plate 42, allowing the arm 36 to move into position before a set of idle trunks. At the termination of the conversation, the subscriber at replaces the receiver, thus interrupting the energizing cir cuit for line relay 61, whereupon the pull down coil of magnet is deencrgized. The calling party on replacing his receiver, causes circuit changes at the succeeding selecting switches which remove ground from conductor 68, and interrupts the energizing circuit for the holding coil 8%. The armature31 of magnet 32 is retracted under the action-oi its controlling spring. The plangcr 6 is free to move and its retractile spring 29 serves to bring the notch 28 in the sectorshaped portion of the plunger into engagen'ient with the rib 11 of the frame 7.

it will be understood that this. disclosure is merely illustrative of applicant sdevice, and that the invention is capable of many modifications and variations, which will be limited only by the scope of the appended claims.

l'l hat is claimed is:

1. In a non-numericalswitch, in combination, contacts serving as terminals of incoming lines and outgoing lines, automatic switching means for interconnecting said. contacts, means for preselecting the contact .1 an idle 0 going line, and rotatable means for pr selecting the contact of a second idle ing line and for actuating said firstmen ioned pi'c clecting moans.

in a non-numerical"switch, in combinatio'n, sets of passivecontacts, contact-makers mounted to interconnect said passive contacts, means for operating said contact-makers, means for preselccting sets of idle con tacts, and means for prcselecting second sets of idle contacts and for actuating said firstmentioned prcsclecting means.

3. In a non-numerical switch, a plurality of sets of passive contacts, a plurality of contact-makers mounted to bring said sets of contacts into conductive relation, means controlling said contact makers for proselecting an idle set of contacts, and means for preselectiug a second set of contacts and serving to operate said first-mentioned preselecting means.

el. In. a non-numerical switch, a plurality of sets of passive contacts, a plurality of contact-makers mounted to bring said sets of contacts into conductive relation, a ll1UlIlber mounted to normally place said contactmakers in operative relation to idle scts of contacts, a. second member normally held in operative relation to second sets of idle contacts and controlling said first-mentioned member, and means operating to move said second member when one of said sets of contacts becomes busy.

In a non-numerical switch, a plurality of sets of passive contacts, a plurality oi": plungers mounted to bring said sets oi" contacts into conductive relation, a member normally positioning idle plungers in 0p erative relation to idle sets of contacts, means for locking said memberlin such position before idle sets of contacts, a second preselecting member, to which said firstmentioned member is" resiliently connected,

means for operating said so on'd member,

and means for locking said sec nd member in operative relation to idle sets of contacts.

6. In a non-numerical switch, a plurality of sets of passive contacts, a plurality of plungers mounted to bring said sets of contacts into conductive relation, means for actuating said plungers, a member normally positioning idle plungers in operative rela tion to idle sets of contacts, a secoi d memher to which said first mentionedmember is resiliently connected and serving to move said first mentioned member, means for lookingsaid first member in the position to which it is moved and for releasing said first member when a plunger has been actuated, means for operating said second member, and means operating to' locl: said second member in operative relation to idle sets of contacts when said first and secondi-mentioned members are out oi aiinement, r

In witness whereof, I hereunto subscribe I my. name this 8th day of September, A. D. 1916. a

CHARLES L. GOODRUM. 

